Get, Set, Assert

readme.md

Get, Set, Assert

Created with <3 with dartpad.dev.

main.dart

void main() {
  
  final v = Square(side: -27);
  //v.set(-2.5);
  print( v.area );
  
}

class Square {
  double _side;

  Square({required double side}) 
    : assert(side >= 0, 'side must be >= 0'),
      _side = side;

  double calculate() {
    return _side * _side;
  }

  double get area {
    //return _side * _side;
    return calculate();
  }

  set(double value) {
    if (value < 0) throw 'value must be >= 0';
    _side = value;
  }
}